Frequencies for first 10,000 rows of drg1ing5 variable in nhamcsopd1998 dataset :

 ingredient |
code #5 for |
 medication |
         #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,859       98.59       98.59
      55348 |          3        0.03       98.62
      55520 |          1        0.01       98.63
      56185 |        131        1.31       99.94
      56265 |          4        0.04       99.98
      56345 |          1        0.01       99.99
      57170 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016